| 摘要 |
<p>In a pointer light tracking method in which pointer light from a laser pointer or LED pointer, which is projected on various kinds of displays such as a projector screen, or a large-size crystal liquid display, is shot by a camera, and the pointer light on the display is subjected to tracking by a computer based on the obtained image data, high accuracy tracking is realized even when an image is displayed on the display. An all black image and white square images located at four corners of the all black image are projected on the display, the display on which the all black image and the white square images are displayed is shot by a camera, a domain corresponding to the white square image is extracted from the obtained image data, central coordinates (x, y) of the extracted domain are computed, and a parameter necessary in performing distortion correction by use of projection conversion for coordinate expressing the position of the pointer light on the display is computed from the computed central coordinates (x, y) and central coordinates (X, Y) of the white square image.</p> |
